Passive Filters(Electrical Engineering Questions ) Questions and Answers

Question 1. A parallel resonant band-pass filter consists of a 90 Ω resistor in series with a parallel network made up of a 60 mH coil and a 0.02 µF capacitor. The output is taken across the capacitor/coil. The coil winding has a resistance of 20 Ω. What is the center frequency of the filter?
  1.    459 Hz
  2.    4,591 Hz
  3.    999 Hz
  4.    2,176 Hz
Explanation:-
Answer: Option B. -> 4,591 Hz
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. In a certain low-pass filter, fc = 3.5 kHz.if the input voltage is a 6 V sine wave with a dc level of 10 V, what is the output voltage magnitude?
  1.    0 V
  2.    5.97 V
  3.    6 V
  4.    597 mV
Explanation:-
Answer: Option B. -> 5.97 V
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. An RL high-pass filter consists of a 470 Ω resistor and a 600 mH coil. The output is taken across the coil. The circuit’s critical frequency is___________?
  1.    125 Hz
  2.    1,250 Hz
  3.    564 Hz
  4.    5,644 Hz
Explanation:-
Answer: Option A. -> 125 Hz
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. An RC high-pass filter consists of an 820 Ω resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz?
  1.    81 µF
  2.    161 µF
  3.    0.161 µF
  4.    220 µF
Explanation:-
Answer: Option C. -> 0.161 µF
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. An RC low-pass filter consists of a 120 Ω resistor and a 0.002 µF capacitor. The output is taken across the capacitor. The circuit’s critical frequency is___________?
  1.    333 kHz
  2.    633 kHz
  3.    331 kHz
  4.    60 kHz
Explanation:-
Answer: Option B. -> 633 kHz
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. In a certain low-pass filter, fc = 3.5 kHz. Its pass-band is_______________?
  1.    0 Hz to 3.5 kHz
  2.    0 Hz
  3.    3.5 kHz
  4.    7 kHz
Explanation:-
Answer: Option A. -> 0 Hz to 3.5 kHz
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. The same signal in Problem 2 is applied to an RC high-pass filter. If the reactance is zero at the input frequency, the output voltage is____________?
  1.    12.73 V peak-to-peak
  2.    18 V peak-to-peak
  3.    9 V peak-to-peak
  4.    zero
Explanation:-
Answer: Option B. -> 18 V peak-to-peak
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. In a series resonant band-pass filter, a lower value of Q results in______________?
  1.    a higher impedance
  2.    a smaller bandwidth
  3.    a higher resonant frequency
  4.    a larger bandwidth
Explanation:-
Answer: Option D. -> a larger bandwidth
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. The maximum output voltage of a certain low-pass filter is 15 V. The output voltage at the critical frequency is_____________?
  1.    10.60 V
  2.    0 V
  3.    21.21 V
  4.    15 V
Explanation:-
Answer: Option A. -> 10.60 V
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. A sinusoidal voltage with a peak-to-peak value of 18 V is applied to an RC low-pass filter. If the reactance at the input frequency is zero, the output voltage is____________?
  1.    18 V peak-to-peak
  2.    zero
  3.    9 V peak-to-peak
  4.    12.74 V peak-to-peak
Explanation:-
Answer: Option B. -> zero
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
© Lakshya_Education.com, All Right Reserved.
Contact Us services